For hatchies I still stick to the once a fortnight feeding of one rat/mouse pup (depending on species). I stick to that for the first year and a half than up their feed to once a week. Than they get to grow at a healthy rate for the first year and a half, and by the time they're 2 1/2 they're ready for breeding (again depending on species). But, a very sontrooversial topic, and everyone does things differently.